Anatomy Unit 3 Flashcards
Study for the Unit 3 Test
What is the epidermis made of?
Stratified squamous epithelial tissue
What structures does the epidermis lack?
Blood Vessels
What happens to epidermal cells as they get older?
The divide & go up towards the epidermis
What are the three layers of the skin?
Epidermis (superficial), dermis, & hypodermis (deep)
What is the dermis made of?
Connective Tissue
What type of tissue is the dermis made of?
Mainly loose & dense connective, but also includes nerve & sensory fibers, hair follicles, sweat glands sebaceous glands, & blood vessels.
What is keratin?
Protein that hardens old epidermal cells
What are the 4 proteins that contribute to skin color?
melanin (darkness), carotene (orange/yellow), hemoglobin (pink/red), & bilirubin (jaundice yellow).
What produces melanin?
Melanocytes
What differs from person to person, the amount of melanocytes, or the amount of melanin released?
The melanin released. Everyone has the roughly the same amount of melanocytes.
What type of tissue is the hypodermis made of?
Mainly adipose tissue & blood vessels.
What is the main function of the epidermis?
To push old cells up to the skin’s surface using keratin.
What are the main functions of the hypodermis?
Binding the skin to the underlying organs, insulating the body, & providing protection from shock.
What are the ABCDEs of mole checks?
asymmetry, border, color, diameter, & evolution/elevation.
What are the 6 functions of the skin?
Temperature Control, Protection, Vitamin D production, Prevention of water loss, excretion of waste, & sensory receptors.
What is the main function of the arrector pili?
To cause hair to stand on end (stay upright).
What is the shared function of both the sebaceous & sweat glands?
Both help to keep the skin from becoming too dry.
What do sebaceous glands secrete?
Sebum, an oily substance
What do sweat glands secrete?
Sweat, a watery substance
What are carcinomas?
Non-pigmented epithelial cells that are common, but slowly grow. They are hard, dry, & scaly growths.
What puts people at risk of carcinomas?
People with fair skin and/or are over 40 years old.
What are the two most common ways to remove carcinomas from the body?
Surgically removing the cancer & radiation
What are melinomas?
Serious & deadly cancer cells that resemble moles.
What is the major cause for developing melanomas?
By short, intermittent exposure to high intensity sunlight.
